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3.1
Operating Mode Selection
This LSI has four operating modes (modes 1, 3, 5, and 7). These modes are determined by the
mode pin settings (MD2, MD1, and MD0). For normal program execution mode, the mode pins
must be set to mode 7. Do not change the mode pins while in the middle of an operation. Table 3.1
shows the MCU operating mode selection.
Table 3.1
MCU Operating Mode Selection
MCU Operating
Mode
MD2 MD1 MD0
1
0
3
0
5
1
7
1
Modes 0, 2, 4, and 6 are not available with this LSI.
After a reset in mode 7, the operation is started in single-chip mode. It is possible to shift to
extended mode when the EXPE bit in MDCR is set to 1.
Modes 1 and 5 are boot modes for flash memory programming/erasing. For details, refer to section
20, Flash Memory (0.18-µm F-ZTAT Version).
Mode 3 is on-chip emulation mode. The JTAG interface is controlled by the on-chip emulator, on-
chip emulation is possible.
Section 3 MCU Operating Modes
CPU Operating
Mode
0
1
Boot mode
1
1
Emulation
0
1
User boot mode
1
1
Advanced
Description
Flash memory programming/erasing
On-chip emulation mode
Flash memory programming/erasing
Single-chip mode with on-chip ROM
enable extended mode
Rev. 1.00, 09/03, page 51 of 704
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